What does "sig!3" mean? - PGP

This is a discussion on What does "sig!3" mean? - PGP ; I'm using gpg 1.2.4. When I checked signatures on my own key, I've
found that one of my self-sig is marked as "sig!3". What does this
mean? A valid v3 self-signature?
This new user id as well as the self-sig ...